Occam's Razor: The Signal to Noise Ratio


Occam's Razor can be paraphrased as "the best explanation is the simplest one". In the case of audio, I suggest the best "explanation" for the best sound is the highest signal to noise ratio. We commonly pursue this with equipment topology, vibration isolation for turntables, electronics and speakers, electrical isolation with dedicated circuits, component isolation, cable hygiene and all our other efforts to eliminate noise pollution. I believe it extends well beyond this, culminating not in what comes out of the speaker, where I think many folks stop, but rather what finally hits our ears. This means wave interference in the listening room is one of our largest noise contributors.

 

I have been fortunate in having the time and means to curate a nice system, but I recognized that it would never deliver the best SNR if the signal that leaves the speaker is corrupted by the noise created as it careens throughout the room before it reaches my ear. Over the last few months, I have added room treatments that together cost more than any one single component in my system.  I initially paid attention to first reflections, creating what I call the “circle of silence” with absorption on the walls, ceiling and floor. I also directed my efforts towards speaker boundary interference response with appropriate placement of the speakers and listening position. Bass traps and a distributed bass array deal with uneven lower bass response. Not wanting to dull the room with overabsorption, I added pure diffusion or a combination of diffusion and absorption.

 

What I now have is a system that not only provides a very accurate signal, but one that is not muddied by all of the other signals (noise) bouncing off the room surfaces.  Instruments and voices are clear with an obvious start and stop. While the system always had decent width and height, they are greater now.  The most significant contribution is that the soundstage now extends in front of and far behind the speakers. On a good rock recording, I can place the drum set, the bass, the keyboard, the vocalists and the guitars three-dimensionally. Classical and jazz are even more remarkable. It is stunning and at times, even startling.

 

I recognize that not everyone has a room they can devote to their audio pursuits, but within your means and what you and yours find socially acceptable, you should do everything you can to attend to the noise your room adds to your pure and pristine signal. Fuses, power cords, cables, amplifier design, speaker type, etc., all pale in comparison. No matter how your particular equipment tastes run, if you were to put your system in my room, it would likely sound better.

 

Bottom line, defend and protect your hard won signal from all the noise throughout the entire reproduction process. Everything counts, especially the room.

 

tcutter

Exactly 

...

Expression is not less hard to reach than perfection...

As said the genius french poet René Char :

«Imperfection is the peak»😊

Yeah, it's the hardest lesson for humans to learn - perfection is not the absolute and imperfection can be your best friend.

Talking about imperfections, I have to admit I am an example. I had stated above that distortion contributes to the SNR but according to those who actually work in the field, I am mistaken. Distortion, although perhaps noisy, is not considered to contribute to the signal to noise ratio, although there are those who incorporate into a SINAD (signal-to- noise-and-distortion ratio). All this being said, the main thrust of my post was to encourage folks to pad their cells. Apologies if I misled some in my quest to accomplish that.

And I just did "pad the cell" to kill off some room nodes - finally. Worth it in ways I am still listening to to see just what exactly is taking place.